The Player's Handbook on Prerequisites says that
Some feats have prerequisites. Your character must have the indicated ability score, class feature, feat, skill, base attack bonus, or other quality designated in order to select or use that feat. (87)
Some feats, however, have as their prerequisites being a creature of a specific size. Here're some examples:
- The general feat Swamfighting (Complete Warrior 105) has as one prerequisite Small size.
- The vile feat Deformity (Tall) (Heroes of Horror 121) has as one prerequisite Medium size.
- The general feat Mighty Roar (Savage Species 37) has an one prerequisite Large size.
- The general feat Blowhard (Savage Species 31) has as one prerequisite Huge size.
To continue this example, compare those feats with these feats:
- The general feat Scramble (Savage Species 39) has as one prerequisite Small size or smaller.
- The general feat Clever Wrestling (Stormwrack 92) has as one prerequisite Small or Medium size.
- The general feat Awesome Blow (Monster Manual 303) has as one prerequisite size Large or larger.
Feats' numeric prerequisites needn't be exactly met by creatures wishing to use those feats' benefits and can be, instead, exceeded. For example, the feat Power Attack has as its prerequisite Str 13, but this prerequisite is met equally well by a creature possessing Str 14 or higher. Does this same equal-to-or-greater-than-the-minimum hold true for prerequisites involving creature size?
Some feats (like the aforementioned feat Blowhard) detail the feat's benefit if the feat is employed by a creature larger the feat's prescribed size, but is this a case of specific overriding general or, itself, a general rule?
Can a feat's size prerequisite be met by a creature bigger than the prerequisite's listed size? Examples:
- For meeting feats' prerequisites is a Medium creature also a Fine, Diminutive, Tiny, and Small creature?
- For meeting feats' prerequisites is a Huge creature also a Fine, Diminutive, Tiny, Small, Medium, and Large creature?
- For meeting feats' prerequisites is a Colossal creature also a Fine, Diminutive, Tiny, Small, Medium, Large, Huge, and Gargantuan creature?
Context: While compiling a feats database that attempts to categorize feats based on prerequisites so as to make customizing monsters easier, I was baffled by some feats' alarmingly specific size prerequisites. It seems odd that, for example, a purple worm, a Gargantuan creature, can't take the feat Blowhard because it's too big . Likewise, it seems odd that a willingly deformed ogre can take the feat Deformity (Tall) despite being bigger than Medium.
And just so you know exactly how trivial this question is, about 40 out of the over 2,000 unique official feats for Dungeons and Dragons 3.5 have size prerequisites.
Note: While some Dungeons and Dragons, Third Edition sources are used in this question, the question is a Dungeons and Dragons 3.5 one, using versions of a feats that have been updated to 3.5 when available, the others forward-compatible because they have not been updated (the DM therefore allowed to update them as he sees fit).